We are tracking PremiStar's add-on acquisition of Armistead Mechanical, serving New Jersey and New York's Hudson Valley, announced April 21, 2026, with advisor PKF Investment Banking confirming April 22. Deal value undisclosed. [CONFIRMED]
Armistead specializes in commercial HVAC, refrigeration, and mechanical systems. At the time of the deal, PremiStar operated sixty-one branches across eighteen states.
PKF Investment Banking acted as exclusive financial advisor to the seller, and no multiple was disclosed.
This is the earlier of PremiStar's two confirmed in-window add-on deals, the later being Salt Lake City's Mechanical Service and Systems in June.
Our data indicates Partners Group is compounding through a high cadence of small regional infill rather than headline platform deals. The Hudson Valley position also carries a compliance wrinkle, since New York's codified R-410A cutoff applies despite the federal reprieve, adding meaningful refrigerant-transition cost that buyers weigh carefully in diligence when they price New York exposure.